For society." The Long Valley Caldera is the largest volcano in California, according to Zhan. It had a super eruption around 720,000 years ago, comparable to the Yellowstone super eruption.

One of California’s riskiest volcanoes has for decades been undergoing ... The Long Valley Caldera was formed by a super-eruption about 760,000 years ago that blasted 140 cubic miles of magma ...

By Soumya Karlamangla The Sutter Buttes are a cluster of volcanic domes about 55 miles ... “Coming home from Southern California or Oregon, or Tahoe or San Francisco, there they are, the Sutter ...

Supervolcanoes and their super-eruptions are the rarest volcanoes ... USGS scored the hazard and exposure factors for each California volcano. Based on the scores, the volcanoes were grouped ...

One of California's riskiest volcanoes has for decades been undergoing ... The Long Valley Caldera was formed by a super-eruption about 760,000 years ago that blasted 140 cubic miles of magma ...

Southern California has many treasures, but believe it or not, nothing like this hidden gem. When most of us think of volcanoes, we think of molten lava spewing up from the earth and melting ...